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Search for a fourth-generation charge -(1/3 quark

S. Eno,P. Auchincloss,D. Blanis,A. Bodek,H. S. Budd,C. Fry,Hiroyuki Harada,Y. Ho,Y. K. Kim,T. Kumita,Takashi Mori,S. L. Olsen,N. M. Shaw,A. Sill,E. H. Thorndike,K. Ueno,H. W. Zheng,R. Imlay,P. Kirk,J.N. Lim,R. R. McNeil,W. Metcalf,S. S. Myung,C. P. Cheng,Ping Gu,J. Li,Y. K. Li,Z. P. Mao,Y. T. Xu,Y. C. Zhu,A. Abashian,K. Gotow,K. P. Hu,E. H. Low,M. E. Mattson,L. E. Piilonen,K. L. Sterner,S. Lusin,C. Rosenfeld,A. T.M. Wang,Stephen Wilson,M. Frautschi,H. Kagan,R. Kass,C. G. Trahern,Richard Breedon,G. N. Kim,Winston Ko,Richard Lander,K. Maeshima,R. Malchow,J. R. Smith,David Stuart,M. Williams,K. Abe,Y. Fujii,Y. Higashi,S. K. Kim,Y. Kurihara,A. Maki,T. Nozaki,T. Omori,H. Sagawa,Y. Sakai,Yasuhiro Sugimoto,Y. Takaiwa,S. Terada,Rodney Walker,F. Kajino,D. Perticone,R. Poling,T. L. Thomas,Y. Ishi,K. Miyano,H. Miyata,Takashi Sasaki,Y. Yamashita,A. Bacala,I. H. Park,F. Sannes,S. Schnetzer,Robert Stone,J. Vinson,H. Asakura,H. Itoh,S. Kobayashi,Akira Murakami,Kouichi Toyoshima,J. S. Kang,H. J. Kim,Moo Hyun Lee,Dong Han,E. J. Kim,D. Son,Takayuki Kojima,S. Matsumoto,R. Tanaka,Yoshio Yamagishi,T. Yasuda,H. Yokota,T. Ishizuka,Kouji Ohta

Physics

Charge (physics)

Particle physics

1989

By studying ${e}^{+}$${e}^{\mathrm{\ensuremath{-}}}$ annihilations in the center-of-mass energy range between 50 and 60.8 GeV, we have established a 95%-confidence-level lower limit on the mass of a fourth-generation charge -(1/3 quark b' of 27.2 GeV. In contrast with all previous searches, this limit has been obtained through consideration of the decay processes b'\ensuremath{\rightarrow}b\ensuremath{\gamma} and b'\ensuremath{\rightarrow}bg aswell as b'\ensuremath{\rightarrow}${\mathrm{cW}}^{\mathrm{\ensuremath{-}}}$. For the cases where any one of the three decay modes dominates, we obtain higher mass limits.

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“Search for a fourth-generation charge -(1/3 quark” is a paper by S. Eno P. Auchincloss D. Blanis A. Bodek H. S. Budd C. Fry Hiroyuki Harada Y. Ho Y. K. Kim T. Kumita Takashi Mori S. L. Olsen N. M. Shaw A. Sill E. H. Thorndike K. Ueno H. W. Zheng R. Imlay P. Kirk J.N. Lim R. R. McNeil W. Metcalf S. S. Myung C. P. Cheng Ping Gu J. Li Y. K. Li Z. P. Mao Y. T. Xu Y. C. Zhu A. Abashian K. Gotow K. P. Hu E. H. Low M. E. Mattson L. E. Piilonen K. L. Sterner S. Lusin C. Rosenfeld A. T.M. Wang Stephen Wilson M. Frautschi H. Kagan R. Kass C. G. Trahern Richard Breedon G. N. Kim Winston Ko Richard Lander K. Maeshima R. Malchow J. R. Smith David Stuart M. Williams K. Abe Y. Fujii Y. Higashi S. K. Kim Y. Kurihara A. Maki T. Nozaki T. Omori H. Sagawa Y. Sakai Yasuhiro Sugimoto Y. Takaiwa S. Terada Rodney Walker F. Kajino D. Perticone R. Poling T. L. Thomas Y. Ishi K. Miyano H. Miyata Takashi Sasaki Y. Yamashita A. Bacala I. H. Park F. Sannes S. Schnetzer Robert Stone J. Vinson H. Asakura H. Itoh S. Kobayashi Akira Murakami Kouichi Toyoshima J. S. Kang H. J. Kim Moo Hyun Lee Dong Han E. J. Kim D. Son Takayuki Kojima S. Matsumoto R. Tanaka Yoshio Yamagishi T. Yasuda H. Yokota T. Ishizuka Kouji Ohta published in 1989. It has an Open Access status of “closed”. You can read and download a PDF Full Text of this paper here.